[Bug 737603] v4l2bufferpool: set buffer interlace flags when field is V4L2_FIELD_INTERLACED

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=737603
  GStreamer | gst-plugins-good | git

--- Comment #1 from Aurélien Zanelli <aurelien.zanelli at parrot.com> 2014-09-29 16:53:36 UTC ---
Created an attachment (id=287378)
 View: https://bugzilla.gnome.org/attachment.cgi?id=287378
 Review: https://bugzilla.gnome.org/review?bug=737603&attachment=287378

v4l2bufferpool: set buffer interlace flags when field is V4L2_FIELD_INTERLACED

If v4l2_buffer.field is V4L2_FIELD_INTERLACED, we set corresponding
GstVideoBuffer flags depending on the video standard.
According to V4L2 specification, M/NTSC transmits the bottom field first, all
other standards the top field first.

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